CVE-2026-86248

CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.25, from 10.1.22 through 10.1.59, from 9.0.92 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

Score

CVSS 3.1 9.8 Critical

Status

Awaiting Analysis - security@apache.org

Published

2026-09-23

Last modified

2026-09-23

Weaknesses

CWE-287

Affected products

• Apache Tomcat (Apache Software Foundation)

References

• https://lists.apache.org/thread/nmkmjp9l53y8h3oc4n8fc0bkw9dv15sk